US4049629A - Solution polycondensation method - Google Patents

Solution polycondensation method Download PDF

Info

Publication number
US4049629A
US4049629A US05/542,644 US54264475A US4049629A US 4049629 A US4049629 A US 4049629A US 54264475 A US54264475 A US 54264475A US 4049629 A US4049629 A US 4049629A
Authority
US
United States
Prior art keywords
chloride
solution
bisphenol
bis
hydroxyl
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US05/542,644
Other languages
English (en)
Inventor
Joseph A. Pawlak
Anthony L. Lemper
Victor A. Pattison
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Occidental Chemical Corp
Celanese Corp
Original Assignee
Hooker Chemicals and Plastics Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hooker Chemicals and Plastics Corp filed Critical Hooker Chemicals and Plastics Corp
Priority to US05/542,644 priority Critical patent/US4049629A/en
Priority to BR7600330A priority patent/BR7600330A/pt
Priority to GB1987/76A priority patent/GB1504091A/en
Priority to NL7600561A priority patent/NL7600561A/xx
Priority to DE19762601958 priority patent/DE2601958A1/de
Priority to FR7601417A priority patent/FR2297871A1/fr
Priority to BE163640A priority patent/BE837724A/xx
Priority to IT19417/76A priority patent/IT1054269B/it
Priority to JP51005372A priority patent/JPS5196887A/ja
Application granted granted Critical
Publication of US4049629A publication Critical patent/US4049629A/en
Assigned to CELANESE CORPORATION reassignment CELANESE CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: OCCIDENTAL CHEMICAL CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
    • C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
    • C08G63/40—Polyesters derived from ester-forming derivatives of polycarboxylic acids or of polyhydroxy compounds, other than from esters thereof

Definitions

  • High molecular weight linear polyester compositions based on bisphenols have been shown to be useful in the preparation of films and fibers. These compounds, when molded into useful articles using conventional techniques, offer properties superior to those articles molded from other linear polyester compositions.
  • Bisphenol polyesters can be prepared by three condensation techniques, i.e., melt homogeneous and interfacial condensation techniques.
  • Melt or bulk polymerization is the simplest method and in this technique the reactants are charged into a vessel and heated.
  • Homogeneous or solution polymerization generally offers a better rate of reaction and temperature control than the melt process since solubility of all reactants in a common solvent permits the reactants to be more thoroughly dispersed and the resulting product is more conveniently handled.
  • the interfacial method the reactants are dissolved in solvents which are immiscible with each other and their reaction takes place at the interface of the solvents.
  • homogeneous or solution polymerization is the least often used for two reasons.
  • the first is that the interfacial technique provides all of the advantages of the homogeneous technique and additionally provides means for maintaining the concentration of the reacants in the reaction zone at a constant level.
  • the second reason is that it is difficult to produce high molecular weight polymers by solution polymerization while such high molecular weight products are easily obtained using either the melt or interfacial techniques.
  • the product rarely has an intrinsic viscosity in excess of 0.6 deciliter per gram of polymer when measured in a solution of symmetrical tetrachloroethane at 30° C., and indeed, most polymers produced by this method have intrinsic viscosities of less than about 0.4 dl/g.
  • the intrinsic viscosity is, of course, a measure of the molecular weight of the product and as the molecular weight decreases, the polyesters become more brittle and lose strength.
  • the molecular weight of the polyesters produced by the solution process are usually not high enough to produce a polyester having good impact strength.
  • the interfacial technique has several disadvantages.
  • One is the possibility of hydrolysis of some of the diacid chloride and formation of carboxylic acid groups which can then react with more diacid chloride forming anhydride linkages in the growing polymer. Exposure to moisture during processing and/or use can result in hydrolysis of the anhydride linkage which could seriously degrade polymer properties.
  • moisture can be excluded by careful drying of all ingredients and solvents by known methods such as distillation, azeotropic distillation of drying of solids in suitable equipment such as vacuum ovens.
  • a solution polymerization method if the hydroxyl-containing compound reacts very rapidly with the diacid chloride it may not be necessary to eliminate the very small amount of water that may be present as an impurity.
  • This invention relates to a solution of polymerization process for the production of high molecular weight, linear aromatic polyesters and more particularly to a process in which the hydroxyl-containing component is added to the diacid halide.
  • a solution polymerization process for the production of linear aromatic polyesters is carried out by adding the hydroxyl-containing component to the diacid halide under polymerization conditions.
  • diacid halides which can be used in the present invention include oxalylchloride and diacid halides of the formula
  • Z is a bivalent or disubstituted radical of 1 to about 20 carbon atoms selected from the group consisting of alkylene, arylene, cycloalkylene, alkylarylene, and arylene-B-arylene where B is --O--, --S--, --SO--, --SO 2 --,--SO 3 --, --CO--, ##STR1## GN ⁇ , or alkylene; Y and Y' are independently selected from the group consisting of CO, SO, SO 2 ; and X is halogen. G is defined hereinafter with respect to the bisphenols. Additionally, mixtures of the diacid halides may be employed to achieve a polymer with especially desired properties.
  • aromatic disulfonyl halides which can be used in the polycondensation reaction according to the invention are: 1,4-benzene disulfonyl chloride; 1,3-benzene disulfonyl chloride; 1,2-benzene disulfonyl chloride; 2,7-naphthalene disulfonyl chloride; 4,4'-diphenyl disulfonyl chloride; 4,4'-diphenyloxide disulfonyl chloride; 4,4'-diphenylmethane disulfonyl chloride; 4,4'-diphenylsulfone disulfonyl chloride; 3,3'-diphenylsulfone disulfonyl chloride; bis-(4-chlorosulfonylphenyl)-2,2'-propane; 4,5-dichloro-1,3-benzene disulfonyl chloride; 4,6-dichloro-1,3-benzene disulf
  • diacid halides of dicarboxylic acids which can be used according to the invention are: terephthaloyl chloride; isophthaloyl chloride; sebacoyl chloride; adipoyl chloride; 4,4'-diphenylether dicarboxylic acid chloride; fumaryl chloride; and maloeyl chloride.
  • Diacid halides of aromatic monocarboxysulfonic acids include m-chlorosulfonylbenzoyl chloride; p-chlorosulfonylbenzoyl chloride; and 2-sulfonylchloride-1-naphthyl chloride.
  • the other halides especially the bromides but also the fluorides and iodides, may be suitably substituted for the chloride to obtain good results.
  • the hydroxyl-containing component used in the present invention is either a bisphenol or a mixture of a bisphenol and a glycol.
  • the bisphenols considered useful for the preparation of high molecular weight polyesters according to the present invention correspond to the general formula: ##STR2## wherein Ar is aromatic, preferably containing 6-18 carbon atoms (including phenyl, biphenyl and naphthyl), G is selected from the group consisting of alkyl, aryl, haloaryl, haloalkylaryl, alkylaryl, cycloalkyl, halocycloalkyl, and haloalkyl, and suitably contains 1-14 carbon atoms; E is a bivalent (or disubstituted) radical selected from the group consisting of alkylene, haloalkylene, cycloalkylene, halocycloalkylene, arylene, haloarylene, --O--, --S--, --SO--, --SO 2 --, --SO 3 --, --CO--, ##STR3## and GN ⁇ , and preferably contains 1-14 carbon atoms T is selected from the group
  • the bisphenols can contain 12 to about 30 carbon atoms, preferably 12 to about 25 carbon atoms.
  • Bisphenols having the above general formula and which are suitable for being applied according to the present invention include, but are not limited to, bis(4-hydroxyphenyl)-methane, bis(3-methyl-4-hydroxyphenyl)-methane, bis(4-hydroxy-3,5-dichlorophenyl)-methane, bis(4-hydroxy-3,5-dibromophenyl)-methane, bis(4-hydroxy-3,5-difluorophenyl)-methane, bis(4-hydroxyphenyl)-2,2-propane [common name - bisphenol-A], bis(3-chloro-4-hydroxyphenyl)-2,2-propane, bis(4-hydroxy-3,5-dichlorophenyl)-2,2-propane, bis(4-hydroxynaphthyl)-2,2-propane, bis(4-hydroxyphenyl)phenylmethane, bis(4-hydroxyphenyl)-diphenylmethane, bis(
  • the glycol can be employed in any amount from 0 up to about 85 mol percent of the hydroxyl-containing component with the bisphenol constituting the balance.
  • the diol is 15-85 mol percent of the hydroxyl-containing component and most preferably about 50 mol percent.
  • the glycols will contain 2-40 carbon atoms and typical examples include ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, hexylene glycol, 2-methyl-2-ethyl-1,3-propanediol, 2-ethyl-1,3-hexanediol, 1,5-pentanediol, thiodiglycol, 1,3-propanediol, 1,3-butanediol, 2,3-butanediol, 1,4-butanediol, 1,3-butylene glycol, neopentyl glycol, 1,2-dimethyl-1,2-cyclopentanediol, 1,2-cyclohexanediol, 1,2-dimethyl-1,2-cyclohexanediol, 2,2,4-trimethyl-1,3-pentanedi
  • any of those materials which are known to be catalysts for the condensation reaction can be employed in this invention.
  • Such catalysts are bases such as tertiary amines such as trimethylamine, triethylamine, pyridine and the like.
  • the base catalyzes the reaction and also neutralizes the hydrogen chloride that would otherwise be liberated during the condensation reaction.
  • the catalyst (and HCl acceptor) is usually employed in twice the molar quantity of the diacid halide although a slight excess of up to about 15 molar percent, preferably 5-10 molar percent, is generally employed to ensure completeness of reaction and to compensate for any loss of volatile base.
  • Suitable inert solvents include both aliphatic and aromatic hydrocarbons as well as simple and cyclic ethers.
  • Typical hydrocarbons include isooctane and benzene fractions such as those having a boiling range of 120°-200° C. Cycloaliphatic compounds such as decahydronaphthalene are also suitable.
  • Benzene, toluene, xylene, and isomeric mixtures of hexylcumene, cyclohexyltoluene, cyclohexylethyl benzene, isopropylethyl benzene, dihexyl benzenes, and diphenyl, and the like are examples of suitable aromatic hydrocarbons.
  • the ethers include diisopropylether, diisoamylether, dimethylethers of ethylene and diethylene glycol, diphenylether, 1,4-dioxane, and the like.
  • nitrobenzene dimethyl sulfoxide and dimethyl formamide
  • chlorinated aliphatic and aromatic hydrocarbons such as methylene chloride, tetrachloroethane, tetrachloroethylene, pentachloroethane, o-dichlorobenzene, trichlorobenzene, ⁇ , ⁇ -dichloroethyl benzene, monochlorobenzene, and the like.
  • the amount of solvent must be sufficient to avoid precipitation as the reaction proceeds.
  • the diacid halide is employed in the form of a 1-25 weight percent solution, preferably 10-25 weight percent, in one of the foregoing solvents, although a more concentrated solution can be used if additional solvent is added as the reaction continues.
  • the hydroxyl-containing component can be employed in the form of about a 15-100 weight percent solution (i.e., if the hydroxyl component is a liquid, it can be employed without solvent) and is preferably used as a 30-50 weight percent solution. Sufficient solvent is used to obtain a polyester concentration of 1-11% or more, depending on viscosity, and preferably about 5-10%.
  • the polymerization process is carried out using the standard solution polymerization techniques except that the hydroxyl-containing component together with the catalyst are added to the diacid halide, preferably with stirring.
  • the addition is preferably performed slowly but this is not necessary if the heat of the exotherm is controlled by cooling via ice baths or solvent reflux.
  • the particular temperatures maintained will depend on the diacid halide. For example, in the case of isophthaloyl chloride, a temperature of 0°-5° C. is suitable while with terephthaloyl chloride a temperature above 15° C. is used in order to maintain the terephthaloyl chloride in solution. In general, the reaction temperature will be from about 0° C.
  • reaction or stirring period is preferably employed, usually lasting about 2-24 hours, depending on the reactivity of the hydroxyl-containing component with the diacid halide. The faster the reaction occurs, the less stirring or reaction time is necessary to ensure completeness of reaction. Thereafter any amine hydrohalide solids can be filtered out of the solution, or the solution can be quenched with dilute hydrochloric acid, washed with distilled water until the washings are free of chloride and filtered.
  • the polymer can then be recovered by the addition of an anti-solvent such as acetone, by addition of the polymer solution to a non-solvent or by the addition of the polymer solution to warm or hot water under high agitation in cases where the solvent has a boiling point below that of water.
  • an anti-solvent such as acetone
  • the color of the composition of this invention is improved by excluding oxygen from the reaction vessel. Phenols and bisphenols upon slight oxidation discolor to a deep red. Since pronounced colors are hard to mask, the polymer to be most useful should be colorless or nearly colorless. Therefore, an inert or unreactive gas is employed to exclude oxygen from the reaction. vessel. While it has been convenient to use nitrogen, suitable unreactive gases or mixtures can be employed including the inert gases such as argon, helium and neon.
  • the process of this invention produces high molecular weight polymers with low melt viscosities which make the polymers suitable for use as engineering plastics, e.g., in the preparation of films and fibers and molded articles.
  • low molecular weight polymers with high melt viscosities are produced when the diacid halide is added to the hydroxyl-containing component is that the more reactive species such as the bisphenols react immediately with the diacid halides forming block polymers which due to crystallinity and/or molecular size become insoluble in the solvent and precipitate out of solution disrupting the stoichiometry.
  • Bisphenol-A terephthalates are known to be highly insoluble, very high melting polymers which exhibit high melt viscosities at normal processing temperatures which are generally at or below the melting point of the bisphenol-A terephthalate polymer.
  • the reverse addition process of this invention always assures an excess of the diacid halide which minimizes the formation of block polyesters and copolyesters.
  • a poly(neopentylene-4,4'-isopropylidene diphenylene terephthalate 50:50) was prepared by an interfacial polymerization method.
  • Terephthaloyl chloride (4.7995 moles) and neopentyl glycol (2.3965 mols) were charged into a 5-liter 3-necked flask equipped with a stirrer and a nitrogen inlet and outlet.
  • a continuous flow of dry nitrogen was passed through the reaction flask while stirring and the flask was heated by means of an electrical heating mantle for 7 hours 25 minutes to a maximum temperature of 80° C. 86% of the theoretical quantity of hydrogen chloride had evolved at the end of the heating period.
  • the reaction product was cooled to 40° C.
  • the reaction mixture was then transferred to a stainless steel mixing tank equipped with a Lightning mixer and a cover containing deionized water (20 gallons).
  • the Pfaudler reactor was rinsed with methylene chloride (30 pound) and the rinse solution added to the stainless steel tank.
  • the solution was agitated slowly for 10 minutes, the agitator turned off and the mixture allowed to separate into two layers.
  • the upper aqueous layer was removed and the washing process repeated using distlled water (5 gallons) until the washings were chloride free.
  • the methylene chloride solution of the polymer was filtered and the volume of the solution was reduced to about 1/4 of the original by distillation.
  • the solid copolyester was precipitated in excess acetone, washed with acetone and dried in a vacuum oven. There was obtained 2.3 pounds 73.3% of theory) of solid dry material.
  • the pertinent reaction parameters and properties of this product are listed in Table I.
  • a poly(ethylene-4,4'-isopropylidene diphenylene isophthalate 50:50) was prepared by a standard solution polymerization method.
  • a mixture of dried bisphenol-A (0.20 mol), dried and distilled ethylene glycol (0.20 mol), dried and distilled triethylamine (0.88 mol) was charged into a 3-liter 3-necked Morton flask in a dry box.
  • the flask equipped with a mechanical stirrer, thermometer, reflux condenser with attached drying tube, an inert gas inlet and a pressure equalized addition funnel, was immersed in an ice bath while maintaining the ingredients inside the flask under agitation and a constant dry nitrogen atmosphere.
  • a poly(ethylene-4,4'-isopropylidene diphenyl isophthalate 50:50) was prepared by the process of this invention.
  • a solution of distilled isophthaloyl chloride (0.40 mol) in dried and distilled methylene chloride (162 ml) was charged into a 3-liter 3-necked flask in a dry box.
  • the flask was equipped in the same manner as described in Example 5.
  • the flask was immersed in an ice bath while maintaining the solution inside under constant dry nitrogen atmosphere with stirring.
  • a poly(neopentylene-4,4'-isopropylidene diphenylene terephthalate 50:50) was prepared by the process of this invention.
  • a solution of distilled terephthaloyl chloride (0.40 mol) in distilled methylene chloride (195 ml) was prepared in a 3-liter 3-necked flask which was equipped in the manner as described in Example 5. The flask was immersed in an ice bath, however, the temperature of the solution was maintained above 15° C. to prevent the precipitation of the terephthaloyl chloride. The solution was kept under a constant dry nitrogen atmosphere with stirring.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polyesters Or Polycarbonates (AREA)
US05/542,644 1975-01-20 1975-01-20 Solution polycondensation method Expired - Lifetime US4049629A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US05/542,644 US4049629A (en) 1975-01-20 1975-01-20 Solution polycondensation method
GB1987/76A GB1504091A (en) 1975-01-20 1976-01-19 Solution polycondensation method
BR7600330A BR7600330A (pt) 1975-01-20 1976-01-19 Processo aperfeicoado de policondensacao em solucao
DE19762601958 DE2601958A1 (de) 1975-01-20 1976-01-20 Loesungspolymerisationsverfahren fuer die herstellung von linearen aromatischen polyestern
NL7600561A NL7600561A (nl) 1975-01-20 1976-01-20 Verbeterde oplossingspolycondensatiewerkwijze.
FR7601417A FR2297871A1 (fr) 1975-01-20 1976-01-20 Procede perfectionne pour realiser des polycondensations en solution
BE163640A BE837724A (fr) 1975-01-20 1976-01-20 Procede perfectionne pour realiser des polycondensations en solution
IT19417/76A IT1054269B (it) 1975-01-20 1976-01-20 Procedimento di policondensazione in soluzione perfezionato
JP51005372A JPS5196887A (enrdf_load_stackoverflow) 1975-01-20 1976-01-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/542,644 US4049629A (en) 1975-01-20 1975-01-20 Solution polycondensation method

Publications (1)

Publication Number Publication Date
US4049629A true US4049629A (en) 1977-09-20

Family

ID=24164717

Family Applications (1)

Application Number Title Priority Date Filing Date
US05/542,644 Expired - Lifetime US4049629A (en) 1975-01-20 1975-01-20 Solution polycondensation method

Country Status (9)

Country Link
US (1) US4049629A (enrdf_load_stackoverflow)
JP (1) JPS5196887A (enrdf_load_stackoverflow)
BE (1) BE837724A (enrdf_load_stackoverflow)
BR (1) BR7600330A (enrdf_load_stackoverflow)
DE (1) DE2601958A1 (enrdf_load_stackoverflow)
FR (1) FR2297871A1 (enrdf_load_stackoverflow)
GB (1) GB1504091A (enrdf_load_stackoverflow)
IT (1) IT1054269B (enrdf_load_stackoverflow)
NL (1) NL7600561A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4132705A (en) * 1977-07-28 1979-01-02 Celanese Corporation Process for preparing a halogenated aromatic polyester having a predetermined molecular weight by solution polymerization technique
EP0005858A1 (en) * 1978-06-01 1979-12-12 Union Carbide Corporation Preparation of polyarylates
US5241037A (en) * 1991-10-16 1993-08-31 Korea Research Institute Of Chemical Technology Nadimide-terminated polyarylates and cured polyarylate resins
US5677416A (en) * 1996-02-26 1997-10-14 Korea Kumho Petrochemical Co., Ltd. Flame-retardant wholly aromatic polyester and method for preparing the same
US20120059185A1 (en) * 2009-07-01 2012-03-08 Rhodia (China) Co., Ltd. Process for producing polyether-polyester block copolymer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS578243A (en) * 1980-06-19 1982-01-16 Unitika Ltd Method of improving transparency of aromatic polyester or composition thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3037960A (en) * 1958-01-09 1962-06-05 Du Pont Linear segmented copolyester and articles formed therefrom
FR1366232A (fr) 1962-06-07 1964-07-10 Onderzoekings Inst Res Un procédé pour préparer des copolyesters
US3160602A (en) * 1960-06-01 1964-12-08 Gen Electric Process of producing aromatic polyesters
US3498950A (en) * 1964-04-24 1970-03-03 Hooker Chemical Corp Process for preparation of a polyester polymer
US3702838A (en) * 1970-08-26 1972-11-14 Du Pont Lewis acid catalyzed diacyl chloride-diphenol polyesterification
US3972852A (en) * 1973-08-07 1976-08-03 Teijin Limited Process for preparing aromatic polyesters from diphenols

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3037960A (en) * 1958-01-09 1962-06-05 Du Pont Linear segmented copolyester and articles formed therefrom
US3160602A (en) * 1960-06-01 1964-12-08 Gen Electric Process of producing aromatic polyesters
FR1366232A (fr) 1962-06-07 1964-07-10 Onderzoekings Inst Res Un procédé pour préparer des copolyesters
US3498950A (en) * 1964-04-24 1970-03-03 Hooker Chemical Corp Process for preparation of a polyester polymer
US3702838A (en) * 1970-08-26 1972-11-14 Du Pont Lewis acid catalyzed diacyl chloride-diphenol polyesterification
US3972852A (en) * 1973-08-07 1976-08-03 Teijin Limited Process for preparing aromatic polyesters from diphenols

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Polyesters, vol. 1, Saturated Polymers, Goodman and Rhys. (1965) American Elsevier Pub. Co. N.Y.C. pp. 13 to 37. *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4132705A (en) * 1977-07-28 1979-01-02 Celanese Corporation Process for preparing a halogenated aromatic polyester having a predetermined molecular weight by solution polymerization technique
WO1979000071A1 (en) * 1977-07-28 1979-02-22 Celanese Corp Solution polymerized halogenated polyesters
EP0005858A1 (en) * 1978-06-01 1979-12-12 Union Carbide Corporation Preparation of polyarylates
US5241037A (en) * 1991-10-16 1993-08-31 Korea Research Institute Of Chemical Technology Nadimide-terminated polyarylates and cured polyarylate resins
US5677416A (en) * 1996-02-26 1997-10-14 Korea Kumho Petrochemical Co., Ltd. Flame-retardant wholly aromatic polyester and method for preparing the same
US20120059185A1 (en) * 2009-07-01 2012-03-08 Rhodia (China) Co., Ltd. Process for producing polyether-polyester block copolymer
US8779084B2 (en) * 2009-07-01 2014-07-15 Solvay (China) Co., Ltd. Process for producing polyether-polyester block copolymer

Also Published As

Publication number Publication date
BR7600330A (pt) 1976-08-31
IT1054269B (it) 1981-11-10
GB1504091A (en) 1978-03-15
FR2297871A1 (fr) 1976-08-13
BE837724A (fr) 1976-07-20
DE2601958A1 (de) 1976-07-22
NL7600561A (nl) 1976-07-22
JPS5196887A (enrdf_load_stackoverflow) 1976-08-25

Similar Documents

Publication Publication Date Title
US3207814A (en) Carbonate-polyester copolymer resinous compositions
US4310652A (en) Melt processable poly(ester carbonate) with high glass transition temperature
US3701815A (en) Thermoplastic siloxane-polyester block copolymers
US4126602A (en) Aromatic polyesters having improved properties
US4814417A (en) Process for producing a liquid crystalline polyester polymer of a cyclohexanedicarboxylic acid and an aromatic diol with pyridine/thionyl chloride catalyst
JP2003501532A (ja) 高ガラス転移温度、低溶融粘度の非晶質コポリエステル
US4105633A (en) Alternating copolyestercarbonate resins
US4330662A (en) Ordered copolyestercarbonate resins
US4049629A (en) Solution polycondensation method
US4123454A (en) Thermoplastic copolyesters
US3498950A (en) Process for preparation of a polyester polymer
US3398120A (en) Polyesters of diacid halide, alkyl bisphenol and glycol
US4251429A (en) Polymer blends with improved flame retardance
US4163099A (en) Polyesters prepared from NH containing carboxylic acids
US4552947A (en) Heat-resisting aromatic polyester and process for preparing the same
US4171421A (en) Thermoplastic copolyesters
US5032661A (en) Thermoplastic polyester-carbonate/polysiloxane block copolymers
US4051107A (en) Microstructured high molecular weight-low viscosity polyester polymers
US4886875A (en) End-capping of polyarylate carboxyl acid ends by use of aromatic carbonates
EP0015828B1 (en) Stress-crack resistant polyarylates and process for the preparation
CA1063292A (en) Polyester solution polycondensation method
US4782132A (en) Process for producing a copolyester
US4051106A (en) High molecular weight copolyester resins having a high degree of alternating structure
US4275188A (en) Stress-crack resistant polyarylates
Jedlińaski et al. Investigations on aromatic polyesters with polynaphthalene systems in the main chain. I. Low‐temperature solution polycondensation

Legal Events

Date Code Title Description
AS Assignment

Owner name: CELANESE CORPORATION, 1211 AVENUE OF THE AMERICAS,

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:OCCIDENTAL CHEMICAL CORPORATION;REEL/FRAME:004625/0378

Effective date: 19851121